package com.zkjl.protect_business.aop;

import cn.hutool.core.thread.threadlocal.NamedThreadLocal;
import cn.hutool.core.util.IdUtil;
import cn.hutool.json.JSONUtil;
import com.zkjl.protect_business.common.SystemLog;
import com.zkjl.protect_business.common.UserThreadLocal;
import com.zkjl.protect_business.entity.Log;
import com.zkjl.protect_business.entity.User;
import com.zkjl.protect_business.repository.LogRepository;
import com.zkjl.protect_business.utils.BeanUtil;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.parameters.P;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;
import java.lang.reflect.Method;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Objects;

import static com.zkjl.protect_business.common.Consts.LOG_TYPE_LOGIN;
import static com.zkjl.protect_business.common.Consts.LOG_TYPE_OPERATION;

@Component
@Aspect
@Slf4j
public class SystemLogAspect {

    @Autowired
    LogRepository logRepository;

    @Autowired(required = false)
    private HttpServletRequest request;

    private static final ThreadLocal<Date> beginTimeThreadLocal = new NamedThreadLocal<Date>("ThreadLocal beginTime");

    /**
     * Controller层切点,注解方式
     */
    //@Pointcut("execution(* *..controller..*Controller*.*(..))")
    @Pointcut("@annotation(com.zkjl.protect_business.common.SystemLog)")
    public void controllerAspect() {
    }

    /**
     * 前置通知 (在方法执行之前返回)用于拦截Controller层记录用户的操作的开始时间
     *
     * @param joinPoint 切点
     * @throws InterruptedException
     */
    @Before("controllerAspect()")
    public void doBefore(JoinPoint joinPoint) throws InterruptedException {
        //线程绑定变量（该数据只有当前请求的线程可见）
        Date beginTime = new Date();
        beginTimeThreadLocal.set(beginTime);
    }


    /**
     * 后置通知(在方法执行之后并返回数据) 用于拦截Controller层无异常的操作
     *
     * @param joinPoint 切点
     */
    @AfterReturning("controllerAspect()")
    public void after(JoinPoint joinPoint) {
        try {
            String description = getControllerMethodInfo(joinPoint).get("description");
            Map<String, String[]> requestParams = request.getParameterMap();
            Log log = new Log();
            log.setId(IdUtil.simpleUUID());

            //请求用户
            //后台操作请求(已登录)
            User user = UserThreadLocal.get();
            if (user != null) {
                log.setBaseInfo();
            }

            //日志标题
            log.setName(description);
            //日志类型
            log.setLogType(getControllerMethodInfo(joinPoint).get("type"));
            //日志请求url
            log.setRequestUrl(request.getRequestURI());
            //请求方式
            log.setRequestType(request.getMethod());
            //请求参数
            log.setRequestParam(JSONUtil.parseObj(requestParams).toString());

            //其他属性
            log.setCreateTime(System.currentTimeMillis());
            //.......
            //请求开始时间
            long beginTime = beginTimeThreadLocal.get().getTime();
            long endTime = System.currentTimeMillis();
            //请求耗时
            Long logElapsedTime = endTime - beginTime;
            log.setCostTime(logElapsedTime.intValue());
            //持久化(存储到数据或者ES，可以考虑用线程池)
            logRepository.save(log);
        } catch (Exception e) {
            log.error("AOP后置通知异常", e);
        }
    }


    /**
     * 获取注解中对方法的描述信息 用于Controller层注解
     *
     * @param joinPoint 切点
     * @return 方法描述
     * @throws Exception
     */
    public static Map<String, String> getControllerMethodInfo(JoinPoint joinPoint) throws Exception {

        Map<String, String> map = new HashMap<>(16);
        //获取目标类名
        String targetName = joinPoint.getTarget().getClass().getName();
        //获取方法名
        String methodName = joinPoint.getSignature().getName();
        //获取相关参数
        Object[] arguments = joinPoint.getArgs();
        //生成类对象
        Class targetClass = Class.forName(targetName);
        //获取该类中的方法
        Method[] methods = targetClass.getMethods();
        String description = "";
        String type = null;
        for (Method method : methods) {
            if (!method.getName().equals(methodName)) {
                continue;
            }
            Class[] clazzs = method.getParameterTypes();
            if (clazzs.length != arguments.length) {
                //比较方法中参数个数与从切点中获取的参数个数是否相同，原因是方法可以重载哦
                continue;
            }
            description = method.getAnnotation(SystemLog.class).description();
            type = method.getAnnotation(SystemLog.class).type();
            map.put("description", description);
            map.put("type", type);
        }
        return map;
    }



}
